The invention discloses a production method of a high H2S
corrosion-resistant
petroleum well casing
pipe J55. The production method comprises the processes of steel making,
continuous casting, heating, rolling, coiling, uncoiling,
pipe making and
heat treating. According to the production method of the high H2S
corrosion-resistant
petroleum well casing
pipe J55, on the component design, low-content C, low-content P and low-content S are adopted to reduce banded segregation, and
cracking and temper
brittleness tendency are reduced; the low-temperature
toughness and the
welding corrosion resistance of steel are improved through low-content O, low-content N and low-content H; Nb, Cr and Mo are added to form a
passivation film,
hydrogen is prevented from entering the
passivation film, and thenthe effect of effectively inhibiting the
hydrogen sulfide corrosion rate is achieved; and a TMCP rolling technology is adopted and combined with a low-temperature rolling technology, therefore, it isguaranteed that
austenite phase transformation is generated at low temperature, ultrafine ferrite structures are obtained, and then production of the high H2S corrosion-resistant
petroleum well casing pipe J55 is achieved. According to the production method, the safety performance of the petroleum well casing pipe industry is greatly improved, and the production method has the characteristics ofbeing low in product cost, excellent in comprehensive performance and the like.